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Engine Oil Additives Comparison - August 2025
7 Best Engine Oil Additives In the UK
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. By purchasing the products we rank, you’ll get the lowest price we found while we may receive a commission at no cost to you, which will help us continue to provide you with value.
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Overview: Engine oil additives are essential for keeping your vehicle running smoothly and efficiently. They help improve engine performance, reduce fuel consumption and reduce wear and tear on vital components. This page provides you with reviews of the different types of oil additives available, so you can make an informed and wise decision.
LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Less Friction & Lower Fuel Consumption I Ceramic Additive 300 ml Pack of 1
Here are the top 3 recommended products with more information to help you find the right product for you
9.9
1
Liqui Moly
LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Less Friction & Lower Fuel Consumption I Ceramic Additive 300 ml Pack of 1
9.3worth the money
9.3distance
9.3Noise level
Why we love it
Extends engine lifespan effectively.
Reduces fuel consumption noticeably.
Compatible with most engine oils.
Main highlights
SMOOTHER ENGINE PERFORMANCE FROM VERY FIRST USE: An engine additive formulated with high-tech ceramic compounds, high thermal resilience. Additive ensures smoother-running engine, extending the engine’s lifespan. Can be used with manual & automatic transmissions. Not suitable for use with wet clutches.
LOWER FUEL CONSUMPTION and diminished emission of pollutants due to smoother engine operation.
EVERYTHING THAT DRIVES WORKS BETTER WITH LIQUI MOLY: We manufacture over 4,000 products: engine oils, additives, vehicle care, chemical servicing and repair, adhesives and sealing products. Our products are currently distributed to over 150 countries worldwide. They are popular everywhere, ensuring a superior driving experience and improved engine performance.
EASY TO ADD DURING OIL CHANGES: The 300 ml bottle is sufficient for up to 5 liters of engine oil. Shake well before use and add to fresh oil. Can be mixed with all gear & engine oils on the market. Long-lasting performance, up to 50,000 km.
CERTIFIED EFFECTIVENESS proven by TÜV Thüringen: Chemical components in Cera Tec smooth out rough surfaces, the ceramic particles fill in uneven surface imperfections. Prevents direct contact of all metal parts, reducing friction and wear & tear. Turbo & Cat tested.
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9.7
2
Lucas Oil
15% Off
Lucas Oil 10001 Heavy Duty Oil Stabiliser, 946 ml
9.6worth the money
9.4distance
9.4Simple to use
Why we love it
Significantly extends oil life, saving on frequent changes.
RESTORES COMPRESSION AND OIL PRESSURE FOR OPTIMAL PERFORMANCE: Over time, engine wear can lead to reduced compression and lower oil pressure, causing inefficiencies and potential damage. This formulation is designed to restore lost compression, helping to maintain the power and efficiency of the engine. By improving oil pressure, it ensures proper circulation of lubricating oil, reducing internal friction and preventing dry starts. This is particularly beneficial for engines that experience increased oil consumption, as it helps maintain stability and efficiency.
REDUCES EXCESSIVE OIL CONSUMPTION AND MINIMISES SMOKE EMISSIONS: Excessive oil consumption is a common issue in older engines or those subjected to high levels of stress. This specially formulated additive reduces the rate at which oil is burned, leading to lower oil consumption and fewer top-ups between oil changes. Additionally, it helps minimise the formation of exhaust smoke caused by oil burning, resulting in cleaner emissions. Reducing smoke output not only benefits the environment but also enhances the overall efficiency of the engine.
QUIETENS NOISY ENGINES AND PROTECTS AGAINST CORROSION AND WEAR: Engine noise is often a result of insufficient lubrication and increased friction between moving parts. This advanced formulation reduces mechanical noise by ensuring that all engine components are adequately lubricated, leading to smoother and quieter operation. Additionally, it offers strong protection against corrosion, oxidation, rust, and wear, shielding the engine from harmful contaminants and moisture. By forming a protective layer on metal surfaces, it prevents rust formation and oxidation, preserving engine performance over time.
IMPROVES THE VISCOSITY INDEX AND STRENGTHENS OIL FILM: Enhancing the viscosity index of lubricating oils is essential to ensure consistent engine performance under varying temperatures. This formulation effectively stabilises the oil’s viscosity, allowing it to maintain its protective properties even under extreme heat or heavy load conditions. By strengthening the oil film, it creates a durable barrier between moving parts, reducing friction and wear. The ability to retain its viscosity under high-temperature, high-shear environments ensures optimal lubrication, prolonging the life of the engine components.
ENSURES SOLID LUBRICATING FILM AND PREVENTS METAL-TO-METAL CONTACT: Maintaining a strong lubricating film is crucial to protect the engine’s moving components from wear and damage. This treatment ensures a solid oil barrier that remains effective even under high load and extreme temperatures. By reducing direct metal-to-metal contact, it prevents surface degradation, friction-induced heat buildup, and premature part failure. The reinforced oil film provides superior lubrication across all critical engine components, minimising the risks of mechanical breakdown.
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Our ranking system
The TopChoice.co.uk Team selects top-of-the-line items from a wide selection and conducts rigorous evaluations on almost all the products available on the internet. We rank each product based on how well it matches our criteria. We can ensure that the product is well-tested with the help of our expertise, experts, and artificial intelligence technology. TopChoice.co.uk requires consistent care for the products we review, ensuring that our assessments are always accurate and up to date.
Features
Our team of experts analyzes key attributes, capabilities, significance, and many more depending on the type of product to determine its effectiveness.
Consumer Reviews
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Popularity
Popularity is an important criterion in choosing a product. Several factors contribute to the popularity of the products on our site, including prestige, relevance, reputation, news, and more.
Value for money
TopChoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.
When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.
Value for money
TopChoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.
When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.
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9.6 
9.9
1Liqui Moly
Extends engine lifespan effectively.
